C k fast4 wood drill bit set of 4 ck tools t2943s4 4 blades offering faster waste removal and 100 more cutting blade than a flat or auger bit cutting edges ground with spur blades for clean hole profile and breakout screw point allows accurate positioning and pulls the bit through with less effort class leading cutting speeds hex drive shaft ck tools t2943s4 fast4 wood drill bit set of 4